Bending-machine.



PATENTBD JAN. 13, 1903.

J. KRUBGER. BENDING MACHINE. APPLICATION. FILED SEPT. 6, 1902.

3 SHEETS-SHEET 1.

N0 MODEL.

PATENTED JAN. 13,1903.

I KRUEGER. BENDING MACHINE.

APPLICATION FILED- SEPT. 6, 1902- 3 BHEETSSBET 2.

' H0 MODEL.

No. 718,478. PATENTED JAN. 13. 1903 'J. KRUEGER. BENDING MAGHINB.

APPLIOATION FILED SEPT. 6, 1902.

N0 MODEL. v 3 SHEETS-SHEET 3. l

UNTTED STATES PATENT @FFICE.

JOHN KRUEGER, OF MILWAUKEE, WISCONSIN.

BENDING= MACHINE.

SPECIFICATION forming part of Letters Patent No. 718,478, dated January13, 1903.

Application filed September 6, 1902. Serial No. 122,321. (No model.)

To all whom it near/y concern:

Be it known that I, JOHN KRUEGER, a citizen of the United States,and aresident of Milwaukee, in the county of Milwaukee and State ofWisconsin,have invented certain new and useful Improvements inBending-Machines; and I dohereby declare that the following is a full,clear, and exact description thereof.

My invention has for its object to facilitate bending of angle-irontoform flanged rings; and it consists in certain peculiarities ofconstruction and combination of parts hereinafter particularly set forthwith reference to the accompanying drawings and subsequently claimed.

Figure 1 of the drawings represents a partlysect ional elevation of amachine organized in accordance with my invention to bend angle ironinto a ring having an inner flange, this view being indicated by line 11 in the fourth figure; Fig. 2, a similar view of a portion of themachine, illustrating the same organized to bend angle-iron into a ringhaving an outer flange; Fig. 3, a horizontal section view of saidmachine, this view being indicated by lines 3 3 in the first figure; andFigs. 4 and 5 transverse sectional views of the; aforesaid machine,respectively indicated by lines 4 4 and 5 5 in said first figure.

Referring by letter to the drawings, A indicates the bed-plate, B 0parallel standards, and D the pillow-block, of a three-rollerbending-machine made according to my invention to facilitate the makingof flanged rings from angle-iron, said standards being connected bystay-rods b conveniently arranged.

Each of the two parallel lower rollers of the machine is shown ascomprising a screwthreaded shaft E, for which standards B C are providedwith bearings, a screw threaded sleeve F, keyed on the shaft, a collar Gheld by a set-screw c in adjusted position on said shaft to oppose oneend of the sleeve, other collars H I, sometimes one and sometimes both,keyed on said sleeve, a nut J, run on the aforesaid shaft against thesleeve end farthest from collar G, and another nut K, run on said sleeveagainst collar I, all of the collars being of the same diameter.

v The upper middle roller of the machine is shown as comprising ascrew-threaded shaft L, shouldered collars M N, loose on the shaft, andset-nuts 0, run on said shaft to oppose the outer shoulder ends of thecollars. Shaft L is journaled in heads P, having verticallyadjustableshanks Q, and a preferably tapered end of said shaft turns in a block R,suspended from a screw S, that turns in the u per transverse portion ofa yoke T, bolted at its ends on the pillow-block 0f the machine. Theshanks Q of heads P have their play in the standards of the machine andlower round ends of these shanks are screw-threaded. Engaging thescrew-threaded ends of shanks Q are nuts U, that turn in plates at,bolted to lugs e of the machine-standards, and lower plate-opposingflanges f of the nuts prevent them from moving up on said shanks. Abevel gear-wheel V is made fast on each nut U by a set-screw g orotherwise to have its hub rest on the adjacent plate 61, whereby descentof said nut on the shank engaging same is prevented. Themachine-standards are provided with bearings h for spindles W, and faston these spindles are bevel-pinions X and hand-wheels Y, the pinionsbeing in mesh with the bevel gear-wheels aforesaid.

One of the shanks Q is in sections on a pivot t in order that its upperportion may be swung clear of a journal of the roller-shaft L, for whichthe head of said shank serves as a hearing.

The machine is provided with a main or pulley shaft Z, and by means of agear-train common in three-roller bending-machines motion is impartedfrom said shaft to the lower rollers.

When the machine is organized for bending angle-iron into rings havinginner flanges, the collar H pertaining to each lower roller is omittedand the collars G I adjusted to provide space on the sleeve F for thehorizontal portion of the angle-iron. By adjustment of the set-nuts O ofthe upper roller the collars M N of this roller are brought in positionto catch the vertical portion of the angle-iron between their innersides, and by manipulation of the screw S and spindlesW said upthereofimpinge against said horizontal portion of said angle-iron, verticaladjustment of the aforesaid upper roller being also proper roller isadjusted to have said collars.

portionate to the diameter of the ring that results from an operation ofthe machine. Either J. or L iron may be bent on the machine and twoL-irons placed web to web to form a .L may be bent at the same time, theresult being two rings each having an inner flange. To bend angle-ironinto rings having outer flanges, collar H is put on sleeve F to abut theinside of collar I and said sleeve and collar G are adjusted withreference to each other to leave an intervening space in which to catchthe vertical portion of the angle-iron, the horizontal portion of saidangle-iron being supported on the collars G II under the collars M N ofthe upper roller, adjusted as shown in Fig. 2. A ring having been benton the machine, the upper roller is adjusted,

to clear said ring and the upper section of the adjustable jointedshank, terminating in a bearing for a journal of the roller-shaft, isswung out, said roller being then supported by the other adjustablebearing and block with which said shaft thereof has engagement.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A bending-machine having parallel rollers each comprising a shaft instationary bearings, a collared sleeve and a collar adjustable on theshaft but held to turn therewith; another roller intermediate of thoseaforesaid on a higher plane and comprising a shaft invertically-adjustable bearings one of which has a jointed shank, collarsloose on the latter shaft and collar-opposing set-nuts adj ustable onthe same shaft; a drive-shaft, and a gear-train connecting thedrive-shaft and parallel-roller shafts.

2. A bendingmachine having a pair of parallel rollers each comprising ascrew-threaded shaft in stationary bearings, a collar adjustable on theshaft but held to turn therewith, a screw-threaded sleeve in keyconnection with the shaft, two collars one or both of which have keyconnection with the sleeve, a collar opposing nut on said sleeve, and asleeve-opposing nut on said shaft; another roller intermediate of thoseaforesaid on a higher plane and comprising a screw-threaded shaft invertically-adjustable bearings one of which has a jointed shank, collarsloose on the latter shaft and collar-opposing set-nuts adjustable on thesame shaft; a drive-shaft, and a gear-train connecting the drive-shaftand parallel-roller shafts.

3. A bending-machine having parallel rollers each comprising a shaft instationary bearings, a collared sleeve and a collar adjustable on theshaft but held to turn therewith; another roller intermediate of thoseaforesaid on a higher plane and comprising a shaft invertically-adjustable bearings one of which has a jointed shank, collarsloose on the latter shaft and collar-opposing set-nuts adjustable on thesame shaft; a verticallyadjustable block engaged by the end of themiddle roller-shaft farthest from the bearing for same that has thejointed shank, a driveshaft, and a gear-train connecting the drive andparallel-roller shafts.

4. A bending-machine having parallel rollers each comprising a shaft instationary bearings, a collared sleeve and a collar adjustable on theshaft but held to turn therewith; another shaft intermediate of thoseaforesaid on a higher plane and comprising a shaftin bearings havingscrew-threaded shanks one of which is jointed, collars loose on theroller, and collar-opposing set-nuts adjustable on the same shaft; nutsheld against travel on the bearing-shanks, means for rotating thesenuts, a drive-shaft, and a geartrain connecting the drive-shaft andparallelroller shafts.

In testimony that I claim the foregoing I have hereunto set my hand, atMilwaukee, in the county of Milwaukee and State of W'isconsin, in thepresence of two Witnesses.

JOHN KRUEGER.

lVitnesses:

H. G. UNDERwooD, B. 0. ROLOFF.

